All Things Dreports that Apple’s vice president of mobile advertising Andy Miller is leaving the company, citing “sources close to the situation”. The departure is interesting because Apple in early 2010 snatched mobile advertising firm Quattro Wireless for $275 million, the company Miller co-founded back in 2006.

Miller will go on to become a general partner at venture firm Highland Capital and staffers at Apple were reportedly told today of his “impending departure”. It is also an undesired setback for Apple’s iAd mobile advertising platform, which had gotten off to a good start only to fade to irrelevance due to high prices and Apple’s seeming inability to exercise flexibility with major marketing agencies who are not used to dealing with such a controlling middle-man.